To Convert a Raster Contour to a Vector

1. Click Raster menu Vectorization ToolsContour Follower.

   The following prompt appears:

   Specify point to follow or [manually Add/Partial]:

2. Do one of the following:
   • Enter a (Add) to manually add a point.
   • Enter p (Partial) to add a partial contour. Click two points on the contour to mark the start and end of the section you want to convert, then click the contour. The follower traces between those points, and prompts you as shown below.
   • Click a raster contour to follow.

     The following prompt appears:

     Manually add point or [Add/Switch/Backup/Rollback/Direction/cOntinue/Vector/Close/Join]:

   Note: When you use the Direction option, it becomes the default option until the Add option is used or until the command is completed.
3. Do one of the following:
   • Click to manually add a point to the contour. If Add is not the default, enter a, then click to manually add a point to the contour.
   • Enter s (Switch) to switch between decision points.
   • Enter b (Backup) to back up to the previous vertex.
   • Enter r (Rollback), then click the vertex to which you want to roll back.
   • Enter d (Direction), then click the direction you want the follower to proceed in. You do not have to click on the entity, only near it, to specify the direction.
   • Enter o (Continue) to make the follower continue in the current direction.
   • Enter v (Vector), then select the vector to follow. You must specify the first and last vertices of the vector. AutoCAD Raster Design toolset follows the vector entity between those vertices.
   • Enter c (Close) to close the contour by drawing a single segment between the two decision points.
   • Enter j (Join), then click an existing vector polyline or contour to join to the current polyline.
   • Press Esc to cancel the current contour and begin another.
   • Press Enter to accept the current contour and begin another.

   The following prompt appears:

   Specify elevation for contour <X.XX>:

4. If the contour follower is set to prompt for elevation, do one of the following:
   • Enter a new elevation.
   • Press Enter to accept the current value.
   Note: You can control the amount AutoCAD Raster Design toolset increments/decrements the suggested elevation for the contour follower by adjusting the Interval settings on the VTools Follower tab of the Raster Design Options dialog box. For more information, see VTools Follower Settings.
5. Repeat steps 3 and 4, or press Enter to exit the command.

Note: Use raster snapping to make it easier to pick points on the raster entity you are converting. For more information, see Raster Snapping.